main tunnel mine

io.write("Enter desired length: ")
length = io.read() + 1
--First
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.digUp()
--Second
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnRight()
turtle.digUp()
--Third
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.digUp()
--Fourth
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnRight()
turtle.digUp()
--Fifth
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.digUp()
--Sixth
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnRight()
turtle.digUp()
--Seventh
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnLeft()
turtle.digUp()
--Eight
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end

turtle.turnRight()
turtle.dig()
turtle.forward()
turtle.turnRight()
turtle.digUp()
--Nineth
for i=1,length,1 do
    turtle.dig()
    turtle.digUp()
    turtle.forward()
end